Q.. (a) Name the group of bacteria the presence of which confirms the contamination of water of a river. (6) Write one negative effect of affluent lifestyle of few persons on the environment. (C) List two items which can easily be recycled, but we generally throw them in the dustbins.​

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thrombocytopenia, which is a deficiency in blood platelets, can cause bleeding and bruising in the dermis similar to senile purpura. other possible causes include: exposure to ultraviolet rays and aging skin are common causes of senile purpura. senile purpura may also be a sign of collagen loss in the skin and bones.